so just to let you guys know what up, am an owner of a 99 400f, and because of this forum i have almost never had any questions that i could not find answered here. so thanks guys!! so to start it off, a little about my machine.. 450 exh. cam maybe aftermarket intake cam? zipty 10oz. flywheel weight fmf slip on and a few other bells and jive, so like nearly every 400-426 owner looking to shave weight. i am in the trying to design a airbox-panel combo out of 18gauge sheet metal, and some fiberglass or if i can aquire some carbon fiber then use some of that. i work in a metal fab shop with access to a cnc plasma table. my goal is half the weight of the stock airbox, and a trick looking side panel. if it goes well i will post some pics and maybe a finished product:ride: once again thanks for all the helpful info!